Home Additions in Seattle & the Puget Sound
Room additions, second stories, and bump-outs designed for energy efficiency and seamless integration.
About Our Home Additions Services
Need more space but love your neighborhood? Love Construction builds additions that integrate seamlessly with your existing home while significantly improving its overall energy performance. We build to Passive House standards wherever possible—super-insulated walls, high-performance windows, and proper air sealing that make your new space the most comfortable room in the house. Every addition comes with our 5-year labor warranty and Built Green certified construction.
- Room additions with super-insulated building envelopes
- Second story additions that maximize your lot without sprawling
- Bump-outs and cantilevers for targeted space gains
- Master suite additions with luxury finishes and energy efficiency
- Seamless architectural integration with existing rooflines and materials
- HVAC extension and electrical panel upgrades sized for efficiency
Our Home Additions Process
Feasibility Assessment
We evaluate your property, review Seattle zoning and setback requirements, assess structural capacity, and discuss budget.
Design & Energy Modeling
Our team creates architectural plans that integrate with your existing home. We model energy performance to ensure the addition exceeds code.
Permitting
We prepare and submit all permit applications, handle plan reviews, and coordinate all required inspections.
Construction
Our crews build your addition with careful attention to weather protection, structural integration, and energy performance.
Integration & Finishing
We complete all interior finishes, exterior details, and ensure the transition between old and new is seamless in both appearance and performance.
Home Additions Service Areas
We provide home additions services throughout Seattle & the Puget Sound. Click on a location to learn more about our services in your area.
Frequently Asked Questions
How do you match the addition to my existing home?
We carefully study your home’s architectural style, materials, and proportions. We source matching or complementary roofing, siding, windows, and trim so guests never know where the original ends and the addition begins.
What does a home addition cost in Seattle?
Home additions in Seattle typically range from $250-$500 per square foot. A simple room addition might cost $80,000-$150,000, while a master suite addition runs $150,000-$300,000+. Second story additions start around $250,000.
How long does a home addition take?
A bump-out or small room addition might take 2-3 months. A master suite addition typically takes 4-6 months. Second story additions can take 5-8 months. Seattle permitting can add 6-12 weeks.
Will my addition be more energy-efficient than my existing home?
Absolutely. We build every addition to exceed current energy code, often to near-Passive House standards. The new space will likely be the most comfortable, efficient part of your home.
Ready for Your Home Additions Project?
Contact Love Construction today for a free consultation.